The pair can be seen passing a puck back and forth while skating around on the ice.
"I've never seen someone ice skate or play hockey on the North Pond," said Ryan Silver, who took the video.
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With temperatures this weekend in the low to mid-30s, this fun activity can quickly become a tragic one if the ice gets too thin.
While the Chicago Fire Department said they have not responded to any water rescues, they ask people to stay off the ice.
"Current water temperature is approx 36F. At that temp, if you fall in the water, loss of dexterity in your limbs happens in less than 3 minutes," the Chicago Police Marine Unit tweeted.
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They also reminded everyone there are several outdoor ice rinks in Chicago to practice slap shots and ice skating.